And the best way to keep that under control is to make a video showing how to do it to everyone just before the week-end where there's 0 chance for Blizzard to hotfix it.

to be fair, this isn't a new discovery or breaking news... someone streamed this exploit and a viewer uploaded the vod to youtube nearly a month ago. i'm surprised i haven't really ran into anyone abusing it though, maybe 1 team

Given the way this arena works once you're outside of it (you'll notice that the enemy become friendly after a certain point), you can also use this method to dupe gold and items.

Noticed the large amount of Blood Spirits on your realm for <3k each? Jeweled Tigers being sold for 30% vendor cost?

They'll give this map the same treatment as RoV and temporarily remove it, I believe. It goes way beyond simply avoiding death and there are many other ways outside of the arena that do not involve blink.